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Sunita's age satisfies x squared equals 9. Her present age is:
A81 years
B3 years
C9 years
D6 years
Answer & Solution
Correct answer: B. 3 years
1. Square roots give 3 or minus 3.
2. An age is positive.
3. So Sunita is 3 years old.
_Source: NCERT Class 10 Mathematics, Chapter 4, Quadratic Equations._
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